开发PolyHis定位的PROTAC降解器的发展
Hui Chen1, Dong Zhu2,3, Monica Billitti2,3
1Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida, USA.
Angewandte Chemie (International ed. in English)
|February 3, 2026
概括
研究人员开发了针对聚胺的PROTACs (polyHisTACs) 来降解缺乏特定连接体的感兴趣蛋白 (POI). 这种新的方法利用一个简单的多胺标签通过ubiquitin-proteasome系统 (UPS) 进行向蛋白质降解.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 化学生物学 化学生物学
背景情况:
- 向性蛋白质降解 (TPD) 使用蛋白质溶解向化马体 (PROTACs) 通过无素-蛋白酶体系统 (UPS) 消除感兴趣的蛋白质 (POI).
- 对于PROTAC应用的一个主要限制是许多蛋白质的高质量标配体的稀缺性,这阻碍了对其可降解性的评估.
- 现有的基于标签的蛋白质降解系统存在限制,限制了它们的广泛适用性.
研究的目的:
- 开发一个多功能平台,用于针对性蛋白质降解,独立于特定的标配体.
- 为了克服当前基于标签的降解系统的局限性.
- 为了能够评估蛋白质可降解性,先前无法药物治疗的目标.
主要方法:
- 通过将Ni2+-NTA头组与VHL或CRBN E3结合酶连接体结合,开发聚胺定向PROTACs (多HisTACs).
- 招募E3结合酶复合体到聚胺标记感兴趣的蛋白质 (POI).
- 使用CRISPR工程的内源性多His标记BRD4和外源性表达的多His标记PSPC1.1的降解试验.
主要成果:
- 多HisTACs成功地降解了CRISPR工程,内生多His标记的BRD4.
- 实现了对外表达,聚His标记的RNA结合蛋白PSPC1的强有力的降解.
- 聚HisTAC系统证明了它的有效性,即使对于一个典型的难以药物治疗的目标.
结论:
- 聚HisTACs提供了一种多功能和可靠的方法来评估UPS介导的可降解性,而不需要针对特定目标的连接物.
- 这个平台在基础研究环境中促进了急性兴趣蛋白 (POI) 耗尽.
- 最小且易于实施的聚胺标签克服了基于标签的现有降解系统的关键局限性.
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